Composition of matter for basing-cement.



' NEW-1mm. s SL NOR I CQRPQBQATION 1 OF mamtljaim w Nnwani eefiosmbawmes non-nnsiiis-cnunnn Specification of Letters Patent.

Application filed September 22, 1906. semi No; 335,695.

To all whom it may concern:

Be it known that I, DANIEL HAND, citizen of the United States, residingat Newark, county of Essex, State of New Jersey, have invented certainnew and useful Improvements in Compositions of Matter for Basing-Cement,of which the following is a specification. Y

My invention relates to the manufacture of cement and particularly thekind used in the manufacture of incandescent lampsfor attaching thebases of the lamps to the bulbs. The cement used for this purpose isusually called a basing compound. l

The object of my invention is the production of a cement of high meltingpoint havin a high degree of adhesiveness which will flow readily whenheated and which soon sets and holds together in a permanent manner theparts to which it is applied;

A further object of my invention is the production of a cement for useas u.- basing compound which is composed of materials which is higherthan that of thegum alone.

I l ve found that it is best to use oxids for this purpose which have abasic nature and not an acidic character, for instance such metallicoxids as .calcium oxid, magnesium oxid, aluminum oxid, zincoxid, leadoxid,

etc. The melting point which any of-these compounds of gum and metallicoxid will have, depends upon the particular substances used and upon theproportions in which they are combined.

In order to cheapen the compound without interfering with itsadhesiveness and flowing property, I add to the compound of m andmetallic oxid as a diluent, some inert material. For this purpose I'findsuch substances as barytes, plaster of paris, whiting, leadsulfate, etc,are well adapted.

The process of combining the above in-' gredients to form a satisfactorybasing compound is very simple and may be as follows:

explained above. prefer either barytes or plaster of paris.

. heating melted to a smoothly fiuid state. The proper amount ofmetallic oxid isthen slowly added become a uniformly fluid mass,theheatbe ing continued meanwhile. -To this metallic oxid and gumcompound, while in this fluid condition, is slowly added, duringconstantstirring, varying proportionsgofinert ma-L 'te'rial, the quantity ofthis depending upon the character of the inert substance used and thepurpose for which the cement is intended. The addition of inert materialis, of course, not carried so far as tointerfere with the flowing of thecompletely mixed mass when this is to be used in basing.

' In order to indicate the manner in WhlCh various gums and metallicoxids 'may. be

combined and mixed with an inert material to form a cement havingcharacteristlcs which adapt it for any particular purpose,

I will now describe a compound which I. have found to be admirablysuited for certain purposes, especially the basing of incandescentlamps. To give my compound thequality of adhesiveness I use what isgenerally called rosin, but tothis I add a small amount of a certaingrade of Manila gum known as lacquer. stock. The purpose of the Manilagum is to raise the melting point of the compound, and this end is alsoattained -by the addition of a metallic oxid as, for example, zinc oxid'inthe manner For my inert material I Therelative amounts of theseingredients which I use. are given below, the percentages being based onthe total weight of materials used: rosin 18%, Manila lacquer stock 2%,zinc oxid 5%, barytes 7 5%. This compound has a. melting point of about125 C. and will readily flow in a stream from the t into the lamp base.When plaster- .oF-parisis used instead of barytes, the proportionsof theingredients which go to make up the compound should be as follows:Trosin 36%, Manila lacquer stock 4%, zincoxid 10%, plaster of paris 50%.

Although I have described in particular two compounds/in which areembodied the principles of my invention,-I wish it distinctly understoodthat I do not mean to be limited to these and that I consider: allcompounds in which substances of the classes pennant nLEoTnIo'ooMrA Y, A

The gum or mixture of" gums is first PatentedApi'flB, 190.9-

and stirred into the gum until the whole has a I I enumerated above arecombined in a manner similar to that which I have described are Withinthe scope of my invention. Compounds of man kinds having propertieswhich fit them or use in various arts may be formed in the manner I haveindicated. The melting point of these Various compounds depends upon thefact that when an gum is heated with. a metallic oxid there results acompound which has a Very much hi her melting point than the gum original'y" had. 'What the melting compound will be, depends o the particulargum used and the amount and kind of metallic oxid which is employed.

What I claim as new", and desire to secure by Letters Patent of theUnited States, is, 1. The hereindescribed composition of vmatter cnsisting of rosin; a metallic oxid mixed therewith to form a chemicalcompoint' of the I course, upon pound, a gum having a higher meltingpoint than said compound, and an inert diluent.-

2. The herem-described composition of matter consisting of rosin, zincoxid mixed therewith to form zinc resinate, a gu having a higher meltingpoint than said resinate, and a powdered inert diluent.

3. A composition of matter consisting of rosin, a basic oxid, Manilagum, and an inert material.

4. A composition of matter consisting of the following substancessubstantially in the proportion by'weight indicated: rosin 18%, Manilagum 2%, zinc oxid 5%, and barytes 75%.

In witness whereof, I have hereunto set my hand this 20th day ofSeptember, 1906.

- y DANIEL HAND.

Witnesses:

S. N. WHITEHEAD, J. HARRY ELKINS,

